Oxyhydrogen-blowpipe.



PATENTED DEC. 26, 1905.

F. JOTTRAND.

OXYHYDROGEN BLOWPIPE.

APPLICATION FILED 00T. 6. 1902.

Wzlzesses.' o.

UNITE STATES Parana eprice.

OXYHYDROGEN-BLOWPIPE.

Specification of Letters Patent.

Patented Dec. 26, 1905.

Application iled October 6, 1902. Serial No. 126,007.

T0 all whom, t 71am/ concer-71,;

Be it known that I, FELIX JOTTRAND, engineer, a subject of the King of Belgium, residing at Uccle, near Brussels, in the Kingdom of Belgium, have invented certain new and useful Improvements in Oxyhydrogen-Blowpipes, of which the following is a specification.

This invention relates to an improved construction of oxyhydrogen blowpipes, the main object of which is to provide apparatus capable of being used safely for gases subjected to unequal pressures, so that the same apparatus may, for example, be employed for oxygen at high pressure and for illuminatinggas at a relatively low pressure, a further ob.

ject of the invention being to insure a perfect mixture of the gases employed Whether at equal or unequal pressures.

With these objects in view the invention consists, in the combination with any mixingchamber, of an injector acting by suction, the characteristic feature of which is that the supply of gas at high pressure takes place through a twyer or nozzle, the gas entering a suctionchamber communicating both with the part supplying gas at comparatively low pressure and with the mixing-chamberproper; and the invention further comprises a special form of mixing-chamber, the distinguishing feature of which is its gradually narrowing coneshaped internal surface, the object of which is to retard the issue of gas through the oritice or burner of the blowpipe as much as is necessary to insure an intimate mixture of the gases.

Referring to the annexed drawings, Figure l is a longitudinal section of a blowpipe constructed according to my invention. Fig. 2 is a front view of a detail of the blowpipe, showing the inlet-orifices for the gases in the suction-chamber.

The improved blowpipe comprises a mixing-chamber l, attached. to asupport or socket 2, provided with a central passage 3 of precalculated size, opening at one end into the mixing-chamber l and at the other end into a chamber 4. of predetermined dimensions, which is herein described as the suctionchamber and is closed by a partition or diaphragm 5, provided with an extension 6, which is so perforated in its central part as to constitute a passage 7 for the gas subjected to the higher pressure. The said passage 7 terminates within the suction-chamber 4 in a twyer l1, (nozzle or nipple,) whereof the orilice is situated at Very little distance from the passage 3, through which the suction-chamber communicates with the mixing-chamber, while its other end joins the tube 8, which supplies high-pressure gas. The tubular portion 6 is surrounded by a chamber 9, connected to the passage 10, which supplies gas at lower pressure. This chamber 9 communicates with the suction-chamber l through a port l0, provided in the diaphragm 5, which closes the said suction-cham ber 4: in the rear. It will readily be seen that, owing to this construction, whatever may be the shape of the mixing-chamber the blowpipe above described will be capable of operating without any danger with gases subjected to unequal pressure-say oxygen compressed at a high degree of pressure and illuminating gas used at the ordinary pressure at which it is supplied through the city mains. For inasmuch as the gas under pressure delivered intol the suction-chamber L through the passage 7 and issuing from such chamber through the nipple 11 will causesuction to take place within such chamber upon its entering the passage 3, leading to the mixingchamber, the gas subjected to the lower of the two pressures Will be drawn by suction from the chamber 9, through the port 10, and into the mixing-chamber, into which it will be carried away by the gas undergoing the higher pressure without any fear of the low-pressure gas being' forced back by the high pressure. In order to insure a perfect mixture of the gases thus conducted into the mixingchamber l, I construct this chamber with a conical section, the diameter of the tube decreasing gradually and to a uniform rate toward the outlet-oriiice 12 of the burner of the blow pipe.

Having thus described my invention, What I claim is# l. In oxyhydrogen-blowpipes in combination: a mixing-chamber, a suction-chamber, thesaid suction-chamber communicating with the mixing-chamberby aid of a passage of precalculated size and being provided with a port for supplying gas at a relatively low pressure, a nozzle placed at the center of the suction-chamber and a tube supplying a relatively high-pressure gas to the said nozzle,

substantially as described and for the purpose set forth.

2. In oxyhydrogen-blowpipes in combination a mixing-chamber, a socket provided with a central passage, a suction-chamber communicating with the mixing-chamber by aid of IOO IIO

said central passage, a partition Closing the suction-Chamber at tlie rear, tbe said partition being provided with a perforated extension in its eentral part, and tlie said perforated eX- tension forming a nozzle in the suction-charnber and being' Connected to a tube supplying a relatively high-pressure gas, and a eliainber surrounding tlie perforated extension tlie said eliarnber eorninunieating' with the suctioneliarnber and being' Connected to a tube supplying a relatively low-pressure gas, su bstantially as described and Vfor the purpose set forth.

3. In oXyliydrogen-blowpipes in Combination, two gas-inlets, a eliarnber of small eapaeity in which open the said gas-inlets, a mixing' elianiber Communicating' with the Chamber of small capacity and having' at its part adjacent to the eliainber of sin-all oapaeity its largest cross-section, tlie section of tlie mixing-chamber narrowing gradually from the part adjacent to tlie eliainber of small eapaeity to the end remote from said Chamber.

4C. In oXyliydrogen-blowpipes, in combination, a mixing-chamber having' a eene-shaped internal surface, a soelet for said mixingelianiber, the said socket being provided with a central passage, a suetion-eliarnber communieating with the mixing-chamber by aid of said Central passage, a partition closing the suction-chamber at tlie rear, the said partition being' provided with a perforated extension in its Central part and tlie said perforated extension 'forming a nozzle in the suctioneliarnber and being' Connected to a tube supplying a relatively high-pressure gas, and a chamber surrounding the perforated eXtension, the said eliainber eornmunieatingwith tbe suction-chamber and being' Connected to a tube supplying a relatively low-pressu re gas, substantially as described and for tlie purpose set forth.

In Witness whereof l have hereunto set my hand in presence of two Witnesses.

FELIX JOTTRAND. lVitnesses:

GREGORY PHELAN,

MAURICE GERBEAULTL 

